Submarine lava flows are the most common type of volcanic eruption on earth.
It is hypothesised that one million submarine volcanoes exist.
Black smokers are submarine fumaroles and have been photographed at a number of areas including south of Hawaii and offshore Oregon, USA.
Examples of Submarine Volcanoes
Kavachi (Solomon Islands)
Metis Shoal (Tonga)
Home Reef (Tonga)
Kick-'em-Jenny (Caribbean)
Loihi Seamount (Hawaii)
Axial Seamount (Offshore Oregon, USA)
Bayonnaise Rocks (Japan)